Push exception raising

Instead of yealding a flag value and then raises an exception,
directly raise the same exception (RuntimeError)

bugwarrior/db.py

@@ -26,10 +26,6 @@
 )
 
 
-# Sentinel value used for aborting processing of tasks
-ABORT_PROCESSING = 2
-
-
 class URLShortener(object):
     _instance = None
 
@@ -335,8 +331,6 @@ def _bool_option(section, option, default):
     }
 
     for issue in issue_generator:
-        if isinstance(issue, tuple) and issue[0] == ABORT_PROCESSING:
-            raise RuntimeError(issue[1])
         try:
             existing_uuid = find_local_uuid(
                 tw, key_list, issue, legacy_matching=legacy_matching

bugwarrior/services/__init__.py

@@ -14,7 +14,7 @@
 from taskw.task import Task
 
 from bugwarrior.config import asbool, get_service_password
-from bugwarrior.db import MARKUP, URLShortener, ABORT_PROCESSING
+from bugwarrior.db import MARKUP, URLShortener
 
 
 # Sentinels for process completion status
@@ -563,9 +563,11 @@ def aggregate_issues(conf, main_section):
             completion_type, args = issue
             if completion_type == SERVICE_FINISHED_ERROR:
                 target, e = args
+                log.name('bugwarrior').info("Terminating workers")
                 for process in processes:
                     process.terminate()
-                yield ABORT_PROCESSING, e
+                raise RuntimeError(
+                    "critical error in target '{}'".format(target))
             currently_running -= 1
             continue
         yield issue